The document discusses key conventions of murder mystery films, including a murder, victim, detective, and murderer. It provides examples from the movie Frantic, noting it includes multiple murders, with Dr. Walker's wife and Michelle as victims. Dr. Walker acts as the detective, following clues like a souvenir and phone number to find his wife. There are also several murderers, including one who kills Dede and another who kills Michelle. The movie contains plot twists, like the souvenir becoming important and Dr. Walker throwing away a sought-after object.